Paint and varnish remover



Patented Mar. 927;

UNITED .STATES 1.62 PATENT former.

ownu marina SWIFT, or nanrnx, nnemnn, assumes. no cn nnnnom cannon.comranx, or new xonx, N. x., n coarom'non or was: menus.

r/ PAINT AND VABNISH REMOVED Drawing.

This invention relates to paint and varnish removers andrelates'especiall to compositions composed of a waxy bo y, a wax solventand a wax precipitant. In which general respect it resembles removersnow commonly used.

Myinvention howeverinvolves in its essential features a wax solvent comosed of aromatic hydrocarbons having di ering rates of volatility orevaporation tendencies.

Thus for example I may employ a mixture of benzol and toluol, or ofbenzol, toluol and lol or in some cases may emplo thell ht oildistillate of crude benzol whic contalns mixtures of these severalhydrocarbons. Preferably I employ as the wax solvent 3.

mixture of benzol and toluol and I have found for this .purpose thatproportions of one volume of toluol to four volumes of benzol areuseful. I

- The wax precipitant may be any alcoholic body miscible with benzol andtoluol, for example ethyl or grain alcohol, denaturzid n some casesmethyl or wood alcohol may be employed, also various ketonic bodies suchas acetone or methyl ethylketone.

One objectoi the present composition is to obtain a mixture havingpowerful penetrating and solvent qualities at a relatively low cost ofmanufacture. This excludes, except in small percentage, the relativelycostly ketone solvents. Denatured ,alcohol afiords the most satisfactorycheap source of alcoholic material.

- l have found that by proportioningtoluol and benzol in this manner.acertain co-operative solvent action is secured in con junction withthe alcoholic or ketone body which increases the cutting speed orremoving activity of the composition. This is especially noticeable witha cheap solvent such as denatured alcohol which is commonly available inper cent strength and has a much slower cutting action "than is the casewith solvents such asacetone or methyl acetone. When admixed howeverwith the hem .zol-toluol wax solvent the resulting -solvent mixtureshowsa substantial. increase in cut-' ting speed over that found whenbenzol for example is usedas the sole wax solvent. Furthermore benzoland toluol are chesgr solvents than alcohols and .ketones and I d m. theneighit ossible to use a junior mPPrfiOliOit-IIG hy rocarbonsolvents; 1n

I lons, denatured alc Application flled necemher 24, 1983. Serial No.682,484.

borhood of two-thirds of the entire bulk of the remover mixture of suchhydrocarbons may be used resulting in dim'zishing the proportion ofalcoholsand ke ne's and a consequent reduction in cost. a

This removing composition is much cheaper to make than compositions madeup according to standard well-known formulas involving equal parts ofbenzol and acetoneas the solvent vehicle, incorporated with a few percent of wax. In spite of this lower. cost, the removing composition madeaccordmg to my invention has a cuttinglspeed quite closely approximatingthat of t e more expensive acetone compositions.

While mineral waxes such as parafiin or ceresin wax may be used in mycomposition I prefer to employ beeswax as this wax does not yield asgreasy a surface as is the case with mineral waxes and hence there is nooccasion for so much care in cleanin the surface before vre-painting.Also there is not the same danger that any residue of beeswax willafi'ect the dr g of a subse uentcoat of paint or varnish or cause succoating to eel.

removing compositions now on the market it is customary to use only asmall surfaces. Hence I may use to advantage in some cases from 8 to15'per cent of wax.-

A removing composition illustrating my invention is made-as follows:light coal tar distillate or crude benzol, containing at least 20 percent of toluol, 20 gallons (i. e. about 5 to 10%), paraflin wax orbeeswax 2 gallons 'to 5 gallons, 90 pier cent benzol 12 galllons. Imtheforegoing formula the wax is ex-- premed in gal one because it is mycustom to first melt the wax and compound it with the other ingredientsby volume mixture.

01, 95 per cent, 15 m5 Another removing. composition is made from benzol26 gallons, toluol 6 gallons, beeswax 5 gallons, denatured alcohol 7%gallons, methyl acetone 7 gallons.

AA stiffer removing composltion may be secured by adding 10 gallonsofde-natured alcohol to the above composition.

A third formula is composed of molten beeswax 10 gallons, light oil ofcoal tar or crude benzol 60 gallons, denaturedalcohol 30 gallons.

' The components of the foregoing formulamay be incor orated in anysuitable manner, for example by melting the wax and adding the waxsolventand finally the Wax precipitant,-stir'ring during such additions.In the foregoing formulae paraflin wax has been set forth as theequivalent of beeswax but it should be understood however that I do notregard these waxes as precise equivalents, both are capable of retardingevaporation of volatile solvents but the beeswax is superior in that itdoes not have the greasy qualities of the mineral wax.

I wish to add that the solvents employed herein are preferably of amiscible character Egrts of benzol by volume, the alcoholic dy beingpreferably denatured alcohol, the softening effect of which may bequickened if desired by the addition of methyl acetone; the proportionof alcohol being preferably less than the wax solvent, a referredformula involving about one-thir by volume of alcohol to two-thirds ofcomposite hydrocarbon solvent; the proportion of the wax used beingreferably somewhat greater than that emp oyed in ordinary liquidremover, preferably ranging from the two or three per cent of waxcustomarily employed u to fifteen or twenty er cent of wax; 'suc highcontent of wax avoring reduction in alcohol content and a reduced rateof evaporation. I

' Finally I may add that a characteristic of removing compositions madeunder the foregoing procedure is that of remaining moist or havingrelatively slow evaporating tendencies thus permitting the compositionto be appliedrto a resistant surface and allowed to remain over nightwhen the softened finish may be readily removed. This quality of myremoving composition is not shown by a great many removing compositionsmade from volatile solvents and so far as I know is exhibited by noothers of comparable low cost and solvent activity.

What I claim is 1. A paint and varnish removing composition comprisingwax, a relatively small volume of an alcoholic body and a relativelylarger volume of wax solvent composed of approximately 4 volumes ofbenzol to 1 volume of toluol. A

2. A paint and varnish removing composition comprising Wax, a waxsolvent consisting of benzol and toluol in the ratio of 4: 1, denaturedalcohol and acetone.

3. A paint and varnish remover as described comprising about two volumesof a 4:1 mixture of benzol and toluol and one volume of an alcoholicsolvent, together with over 5% of a wax.

OWEN PARKER srr.

